Setting Rf Menu Parameters; Set The L-Band Input Frequency; Set The L-Band Output Frequency (Option); Static Awgn Operation (Optional Feature) - DBM ACE9600 Operating Manual

Advanced Channel Emulator
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S e ttin g RF Me n u P ara m e te rs
S e t th e L-Ba n d In p ut Fre q u e n c y
Press the RF in frequency field for the desired channel
Enter a numeric frequency value (in MHz).
Press MHz or Enter to enter.
S e t th e L-Ba n d Outp u t Fre q u e n c y (Optio n)
Press the RF out frequency field for the desired channel
Enter a numeric frequency value (in MHz).
Press MHz or Enter to enter.
Note that the output frequency is independent of the input frequency
only if the instrument hardware is configured for independent input and
output frequency. Otherwise, the input and output frequencies will
track. For this configuration, modify the RF in value, and the RF out
value will change automatically.
S ta tic AWGN Op e ra tio n (Op tio n a l Fe a tu re )
The optional AWGN feature adds white Gaussian noise to the user's
signal. There are two modes of operation 1) Ratio mode that sets the
noise density (N ) based on an E
o
and the bit rate, or 2) Noise Density mode, that sets the noise density by
direct entry, irrespective of the signal level. The noise has a constant
power spectral density over the operating bandwidth of the instrument.
The ratio mode uses a true rms detector to measure the input signal
power. Ratio and Bit Rate settings in combination with this measured
power determine the applied noise density, such that the desired E
ratio is achieved. The resultant noise density is displayed.
Figure 2-10. RF Frequency display
/N ratio, the measured signal power,
b o
dBm
/N
b o
ACE9600
Operations Manual